Did your opponent blunder his queen due to time pressure?
Don't Give Material away to make games more interesting!
well taking your opponent easy if he is underrated is a very risky decision.You should play with more care against lower rated opponents than the higher rated ones because you loose more rating points if you loose to lower rated players and they usually tend to go all out so tackling them becomes difficult.
I blundered by queen knowingly as i was 10 points up
But don't do it
Fortunately I had time by my side